Imports of package parsers

PathSynopsis
crypto/sha256Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4.
crypto/sha512Package sha512 implements the SHA-384, SHA-512, SHA-512/224, and SHA-512/256 hash algorithms as defined in FIPS 180-4.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/docker/distribution/referencePackage reference is deprecated, and has moved to github.com/distribution/reference.